Correlations Flashcards
what are the three types of correlation
positive
negative
zero
what type of graph do correlations use
scatter graph
what do correlations measure
co variables
what is a positive correlation
as one variable increases so does the other
what is a negative correlation
as one variable increase the other decreases
what is a zero correlation
there is no relationship between variables
strength of correlation
-variables occur naturally that cannot be measured experimentally such as the size of someone’s head and intelligence can be investigated which cannot be done in an experiment
-these normally high levels of ecological validity as participants are in their normal environment
weakness of correlation
-it is difficult to establish cause and effect between variables. Just because they’re correlated does not mean that one causes the other
-there are issues with construct validity as this mainly uses quantitative data as we may not measure something accurately